Passengers on the sinking ferry faced a terrifying choice as the vessel sank: obey commands to stay calm and stay on the ship from loudspeakers, or put on life vests and jump into the freezing ocean water.

News_Rich_Media: Mobile phone footage from inside the Korean ferry as it starts to sink.

“Don’t move,” a voice warned, according to a recording obtained by CNN affiliate YTN.

“If you move, it’s dangerous. Don’t move.”

That announcement, some witnesses worried, may have cost some passengers on the ferry Sewol their lives.

“Kids were forced to stay put,” one survivor told CNN affiliate YTN, “so only some of those who moved survived.”

Their harrowing stories on film come as the captain is being investigated by police, after it was revealed he was not at the helm of the ferry that capsized two days ago.

“The captain was not in command when the accident took place,” prosecutor Park Jae-Eok told a press briefing.

The captain was “in the back” he added, without elaborating. The captain apologised to the victims and their relatives, but offered no clear explanation for what caused the Sewol to capsize.

Anger also continues to spread over stalled rescue efforts for the hundreds of missing passengers trapped by the submerged vessel.

News_Image_File: Under scrutiny ... Lee Joon-seok, the captain of a sunken ferry in the water off the southern coast arrives to be investigated at Mokpo Police Station in Mokpo. Picture: Yonhap

More than 48 hours after the 6,825-tonne Sewol suddenly listed and then sank, a small of army of more than 500 exhausted divers — battling powerful currents in almost zero visibility — have yet to obtain any access to the ferry’s interior.

The confirmed death toll stood at 28, but the focus of concern remained the 268 people still unaccounted for — hundreds of them children on a high school outing to the southern resort island of Jeju.

The newly recovered bodies were all floating in the water and none had been retrieved from the ship itself, coastguard officials said, as dive teams worked to find a way inside the submerged vessel in the increasingly slim hope of finding survivors trapped in air pockets.

News_Image_File: Recovering the dead ... South Korean rescue members carry a body of a passenger. Picture: Yonhap

“Two divers are currently injecting oxygen into the ship,” a coastguard official said.

The only visible piece of the ferry, a small stern section of the keel, slipped just below the surface on Friday afternoon.

The weather conditions were challenging, with rain, fog and strong sea swells. Of the 475 people on board when the Sewol capsized, 179 were rescued, but no new survivors have been found since Wednesday.

Three giant, floating cranes reached the disaster site, but regional coastguard commander Kim Soo-Hyun stressed they would not begin lifting the multi-deck ferry until they were sure there were no survivors inside.

“I want to be clear: There won’t be any salvage work done against the will of the families,” he said.

News_Image_File: Clinging on for life ... a passenger is hoisted onto a Coast Guard helicopter off the southern coast near Jindo. Picture: South Korean Coast Guard via AP video

There were 352 students on board and for the parents of those who were not rescued there was bitter resentment at what they saw as the inadequacy of the official response.

“It’s been two days but no one has been brought out alive,” complained Lee Yong-Gi, whose son was among the missing students.

“I firmly believe that the kids are alive. We need to rescue them as soon as possible. But officials are dragging their feet,” Lee told AFP.

Another father accused the authorities of indifference and deception in an appeal broadcast live on television.

“The government lied yesterday,” he said, speaking from a podium in a gymnasium on Jindo island where hundreds of blanket-wrapped relatives have been sleeping on the floor since the tragedy unfolded.

News_Image_File: Grief-stricken families ... medics attend to a distressed woman at a gymnasium used as a gathering point for relatives of missing passengers aboard a capsized ferry, in Jindo. Picture: Ed Jones

Disputing the official figures of hundreds of divers, vessels and aircraft being deployed, he said he and other relatives had visited the rescue site and seen only a dozen ships and helicopters.

“Everyone, is this the reality of South Korea? We plead once more, please save our children,” he said.

The initial public backlash has centred on the captain, Lee Joon-Seok, and his 28 crew, most of whom survived the disaster.

State prosecutors said preliminary investigations showed the third officer was at the helm of the ferry.

News_Image_File: Trying to get inside ... rescue work by members of the Republic of Korea Coast Guard continues around the site of ferry sinking accident off the coast of Jindo Island. Picture: The Republic of Korea Coast Guard

Tracking data from the Maritime Ministry showed that the ferry made a sharp turn just before sending its first distress signal.

Some experts believe a tight turn could have dislodged the heavy cargo manifest — including more than 150 vehicles — and destabilised the vessel, causing it to list heavily and then capsize.

But others suggested the turn might have been caused by a collision with a rock or other submerged object.

Chief prosecutor Lee Seong-Yoon stressed there was “no limit” to the range of the investigation.

“We will make sure ... those responsible are sternly held accountable,” Lee said. As well the cause of the disaster, investigators will be looking at why passengers were ordered to stay in their cabins and seats for up to 40 minutes after the ferry ran into trouble.

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